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J Clin Microbiol. 1994 November; 32(11): 2646-2654

Evolution and replacement of Candida albicans strains during recurrent vaginitis demonstrated by DNA fingerprinting.

K Schröppel, M Rotman, R Galask, K Mac and D R Soll

Department of Biological Sciences, University of Iowa, Iowa City 52242.

ABSTRACT

Southern blot hybridization with the Ca3 probe and the C fragment of the Ca3 probe was used to assess the genetic relatedness of Candida albicans strains from one patient with recurrent C. albicans infection in whom the same strain was maintained, one patient in whom the infecting strain was replaced, and their male sexual partners. In the patient in whom the infecting strain was maintained, the infecting strain exhibited a minor genetic change in each successive episode of Candida vaginitis. These genetic changes occurred in the C-fragment bands of the Ca3 hybridization pattern. In the patient in whom the infecting strain was replaced by another infecting strain, a transition infection involved a genetically mixed infecting population, and the replacement strain appeared to have originated from the oral cavity of the male partner. The results demonstrate that the infecting strains of recurrent Candida vaginitis are not genetically stable, that drug treatment can result in the selection of variants of the previously infecting strain or replacement by a genetically unrelated strain, and that the male partner can be the source of a replacement strain.

J Clin Microbiol. 1994 November; 32(11): 2646-2654




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